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https://issues.apache.org/jira/browse/MAPREDUCE-3624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13180687#comment-13180687
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Eli Collins commented on MAPREDUCE-3624:
----------------------------------------

+1

Btw, I made the same change to hadoop a while back (HADOOP-7374), same 
rationale applies here.
                
> bin/yarn script adds jdk tools.jar to the classpath.
> ----------------------------------------------------
>
>                 Key: MAPREDUCE-3624
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3624
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Mahadev konar
>            Assignee: Mahadev konar
>             Fix For: 0.23.1
>
>         Attachments: MAPREDUCE-3624.patch
>
>
> Thanks to Roman for pointing it out. Looks like we have the following lines 
> in bin/yarn:
> {code}
> CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar
> {code}
> We dont really have a dependency on the tools jar. We should remove this.

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